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Diffstat (limited to '')
| -rw-r--r-- | fs/cifs/smb2ops.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index c36ff0d1fe2a..ab4737e3c31f 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -1821,6 +1821,14 @@ smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon, u32 max_response_size; struct smb_snapshot_array snapshot_in; + /* + * On the first query to enumerate the list of snapshots available + * for this volume the buffer begins with 0 (number of snapshots + * which can be returned is zero since at that point we do not know + * how big the buffer needs to be). On the second query, + * it (ret_data_len) is set to number of snapshots so we can + * know to set the maximum response size larger (see below). + */ if (get_user(ret_data_len, (unsigned int __user *)ioc_buf)) return -EFAULT; |